Trouble recording system



March 1931 F. s. IRVINE ET AL 1,348,174

TROUBLE RECORDING SYSTEM Filed Feb. 28, 1931 25 Sheets-Sheet 1 Q if u a; 8 w 3% i 5:

Q 335 R t t E 0 3 Q g I 3 3 I Ch 9 Q $3 an m as m R Q I R Q N "a v o 0 m 1% 3 3 E m ESJRV/NE INVENTOPS 7TH. ROBERTS A TTOPNEV March 8, 1932. 5 |RV|NE ET AL 1,848,174

TROUBLE RECORDING SYSTEM Filed Feb. 28; 1931 25 Sheets-Sheet 2 5% H n HI I HI E5 ga IHIHHHHH MINIMUM;

MARGINAL cb m fi Nicer-15y March 8, 1932 S RWNE ET AL 4 74 TROUBLE RECORDING sYsTErk Filed Feb. 28, 1931 j 25 Sheets-Sheet 5 V F. s. 'IRV/NE Y I H. ROBERTS rm/ma Marsh 8, 1932. F. s. lRVlNE ETAL 1,843,175}

TROUBLE RECORDING, SYSTEM Filed Feb. 28, 1951 25 Sheets-Sheet 4 F. s. lW/NE MEMO 7': HRGEEQTS ATTORNE) i rah 8 1932" s. IRVINE ET AL 1,843,174

TROUBLE RECORDING SYSTEM Filed Feb. 28, 1931 25 Sheets-Sheet 5 F. 5. IRVINE INVENTORSI H. ROBERTS BY @6.Mnu%- ATTORNEY March 8, 1932 F. s. IRVINE ET AL 384 3 4 TROUBLE REC ORDING SYSTEM Filed Feb. 28, 1951 .25 Sheets-Sheet 6 1 "'3 v V Q 1 2 R Q 2 3 :3

F. s. IRVINE T. H. ROBERTS ATTOEWEK March 8, 1932.

F. s. IRVINE ET AL TROUBLE RECORDING SYSTEM Filed Feb. 281. L951 l INVENTORS 25 She'efs-Sheet 7 F. S. IRVINE T H. ROBERTS ATTORNEY,

March 8, 1932. F. S. RwNE ET AL 1,848,11

TROUBLE RECORDING SYSTEM 25 Sheets-Sheet 8 I 'Filed Feb. 28. 1951 F. 5. IR VINE MFA/T0 r. H.ROBERTS March I932 F. s. IRVINE ET- AL 1,343,174

TROUBLE RECORDI NG SYSTEM 25 Sheets-Sheet 9 Fi led Feb. 28, 1931 F. s. IRVINE 'NVENTORS r H. ROBERTS ATTORNEY March 1932- F. s. IRVINE ET AL 1 1 TROUBLE RECORDING SYSTEM Filed Feb. 28, 1931 25 Sheets-Sheet 1o F. s IRVINE 'NVENTOPS r H.ROBE'RT$ A TTORNEY March 8, 1932. F. s. mvsNE "ET AL 1,848,174

TROUBLE RECORDING SYSTEM Filed Feb. 28, 1931 25 Sheets-Sheet ll E I HI ATTORNEV Malch 1932 F. s. IRVINE ET AL 4 TROUBLE RECORD ING SYSTEM Filed Feb. 28, 1931 25 Sheets-Sheet l2 r. SJRV/NE T. H. ROBERTS r 6'? w mzzz March 8, 1932. F. s. IRVINE ET AL 7 1,848,174

TROUBLE RECORDING SYSTEM Filed Feb. 28, 1931 25 Sheets-Sheet 13 Th :Hh 1- lHl- F. SJIPV/NE WVENTORS TTHROBERTS A TTORNE) March 8, 1932.

F. S. IRVINE ETAL TROUBLE RECORDING SYSTEM Filed Feb 28, 1951 1 25 INVENTORS Sheet-Sheet 14 F. s IRVINE H. ROBER T5 ATTORNEY March 8, 1932. F. s. IRVINE ET AL 1,343,174

TROUBLE RECORDING SYSTEM Filed Feb. 28, 1931 25 Sheets-Sheet l5 ill-II rwaws A TTOPNEV March 8, 1932. I F. S, IRVINE ET AL 1,848,174

TROUBLE RECbRDING SYSTEM 25 Sheets-Sheet 16 Filed Feb. 28, 1931 F. s. IRVINE T. H. ROBERTS ATTORNEY March 8, 1932. F s lRVlNE ET AL I 1,848,174

TROUBLE RECORDING SYSTEM Filed Feb. 28, 1951 25 Sheets-Sheet l7 F. 5. IRVINE H. ROBERTS IN VE N TORS ATTOPNEY March 8, 1932. v F. s. IRVINE ET AL TROUBLE RECORDING SYSTEM Filed Feb. 28, 1931 25 Sheets-Sheet 18 I l l 1s, MWZ

ATTORNEY FIG/9 TROUBLE RECORDING SYSTEM Filed Feb. 28, 1951 25 Sheets-Sheet 19 1 l/EN TOPS R 5 BY A '6.

ATTORNEY March 8, 1932. F. s. IRVINE ET AL TROUBLE RECORDING SYSTEM Filed Feb. 28, 1931 25 Sheets-Sheet. 2O

WVENTORS 7f B y Q flaw ATTORNEX 

